Shares in Italian infrastructure group Atlantia, which operates the motorway on which a bridge in Genoa collapsed, were suspended from trading on the Milan stock exchange on Thursday.

Atlantia's prime asset is Autostrade per l'Italia, which operates the A10 highway where a segment of the overpass collapsed, killing at least 39 people. Its shares had already plunged by more by 10 percent on Tuesday, before closing 5.4 percent lower at 23.54 euros.